快速
の説明 快速 あなたのレベルで:
You can use fast to describe speed. If a car moves with high speed, it is a fast car. You can say 'The train is fast.' It is very simple to use!
At this level, you can use fast to talk about habits or routines. 'I eat fast when I am hungry' or 'She is a fast runner.' Remember, we do not add '-ly' to this word.
Use fast to describe processes or trends. 'The company is growing at a fast pace.' It is useful for describing changes in your environment or work life effectively.
In B2, you will encounter more idiomatic uses. 'Fast track' your career or 'play fast and loose' with the rules. These phrases add nuance to your professional and social communication.
At the advanced level, consider the distinction between 'fast' and 'quick.' While often interchangeable, 'fast' emphasizes the speed of movement, whereas 'quick' often emphasizes the promptness or suddenness of an action.
Mastery involves understanding the etymological roots, such as 'fast' as 'firmly fixed' (e.g., 'fast colors' or 'a fast knot'). Recognizing these archaic or technical meanings demonstrates a deep command of English history and vocabulary.
快速 30秒で
- Fast means high speed.
- It is an adjective and adverb.
- Never add -ly.
- Commonly used in idioms.
When we say something is fast, we are talking about speed. It is a very common word that you will use every single day. Whether you are talking about a fast runner, a fast car, or even a fast learner, the core meaning remains the same: high speed.
Think of fast as the opposite of slow. It implies that there is very little time passing between the start and the finish of an action. It is a versatile word that works in almost any situation, from casual chats to professional emails.
The word fast has a fascinating history. It comes from the Old English word fæst, which originally meant 'firm,' 'fixed,' or 'steadfast.' This is why we still have the phrase 'hold fast,' meaning to hold onto something tightly.
Over time, the meaning shifted from 'firmly fixed' to 'moving quickly.' This happened because if you are moving 'firmly' or 'steadily' toward a goal, you are often moving with great purpose and speed. It is a great example of how language evolves from physical stability to physical movement.
You can use fast as an adjective or an adverb. For example, you can have a 'fast car' (adjective) or you can 'drive fast' (adverb). It is very flexible and doesn't change its form, which makes it easy to learn!
Common collocations include 'fast food,' 'fast lane,' and 'fast pace.' It is generally neutral in tone, making it perfect for both casual conversations with friends and professional settings where you need to be clear and concise about timing.
Idioms are fun ways to use the word. Fast and loose means acting without care for rules. Fast asleep means you are in a deep, sound sleep. Fast track refers to a quick way to achieve a goal. Hold fast means to keep a firm grip. Fast talker describes someone who is very persuasive, sometimes in a dishonest way.
In terms of grammar, fast is an irregular adverb. Unlike 'quick' which becomes 'quickly,' we do not say 'fastly.' We simply use 'fast' for both the adjective and adverb forms. The IPA is /fæst/ in American English and /fɑːst/ in British English.
It rhymes with words like 'last,' 'past,' 'cast,' 'mast,' and 'vast.' When you say it, try to make the 'a' sound sharp and clear. It is a one-syllable word, so keep it punchy!
豆知識
The meaning shifted from 'firm' to 'quick' because being firm/steady often meant moving with purpose.
発音ガイド
Long 'a' sound like in 'car'.
Short 'a' sound like in 'cat'.
よくある間違い
- Adding an 'l' sound
- Pronouncing it like 'first'
- Misplacing the stress
韻が合う語
難易度
Easy to read
Easy to write
Easy to say
Easy to hear
次に学ぶべきこと
前提知識
次に学ぶ
上級
知っておくべき文法
Adjective vs Adverb
He is fast (adj), he runs fast (adv).
Compound Adjectives
fast-paced
Irregular Adverbs
fast, hard, late
レベル別の例文
The cheetah is very fast.
Cheetah = fast animal
Adjective usage
He runs fast.
He runs with speed
Adverb usage
This car is fast.
Car = high speed
Adjective
The internet is fast.
Connection speed
Adjective
She is a fast reader.
Reads quickly
Adjective
Don't walk so fast!
Slow down
Adverb
The bike is fast.
Bicycle speed
Adjective
Time goes fast.
Time passes quickly
Adverb
The fast train arrives at noon.
He is a fast learner.
We need a fast solution.
She drives a fast motorcycle.
The fast wind blew my hat.
Eat your breakfast fast.
They are fast friends.
The growth was fast.
The project is on the fast track.
He is fast asleep in his room.
The fast-paced city life is exciting.
We need to act fast.
The fast-moving storm is coming.
She is a fast talker.
The fast food industry is huge.
Keep a fast pace during the race.
Don't play fast and loose with the budget.
The economy is in a fast decline.
He holds fast to his beliefs.
The fast-acting medicine worked well.
She is a fastidious worker.
The fast-approaching deadline is stressful.
We are in the fast lane of life.
The fast-developing situation is complex.
The fast-talking lawyer convinced the jury.
His fast-paced delivery kept the audience engaged.
The fast-track promotion surprised everyone.
The fast-dwindling resources are a concern.
She is fast becoming a legend.
The fast-changing market requires agility.
He fast-tracked the application process.
The fast-moving events caught us off guard.
The colors are fast and will not fade.
He was held fast by his principles.
The fast-flowing river carved the canyon.
A fast friendship was formed in childhood.
The fast-rising tide threatened the shore.
The fast-fading light ended the day.
He is fastidious about his work.
The fast-paced narrative kept me reading.
よく使う組み合わせ
慣用句と表現
"fast and loose"
Acting without regard for rules.
He played fast and loose with the company funds.
casual"fast asleep"
Sleeping deeply.
When I checked, they were fast asleep.
neutral"fast track"
A route to success.
She is on the fast track to a promotion.
business"hold fast"
To remain firm.
The captain told the crew to hold fast.
formal"fast friends"
Close, loyal friends.
They became fast friends in college.
neutral"fast one"
A trick.
He tried to pull a fast one on me.
casual間違えやすい
Similar meaning
Quick is often sudden; fast is sustained speed.
A quick look vs a fast car.
Formal synonym
Rapid is used for processes.
Rapid change vs fast runner.
Elegant synonym
Swift is more formal.
A swift decision.
Speed-related
Brisk implies energy.
A brisk walk.
文型パターン
Subject + is + fast
The car is fast.
Subject + verb + fast
He runs fast.
Fast + noun
A fast car.
Fast-paced + noun
A fast-paced movie.
Fast + adverbial phrase
He ran fast down the street.
語族
名詞
動詞
形容詞
関連
使い方
10
丁寧さの度合い
ヒント
Memory Palace
Native Speaker Habit
Cultural Context
Grammar Shortcut
Say It Right
Avoid Fastly
Did You Know?
Study Smart
Collocations
Adverb Rule
暗記しよう
記憶術
Fast cars go by so fast!
視覚的連想
A cheetah running.
Word Web
チャレンジ
Write 5 sentences using 'fast' today.
語源
Old English
元の意味： Firm, fixed, steadfast
文化的な背景
None
Commonly used in sports and business contexts.
実生活で練習する
実際の使用場面
Travel
- fast train
- fast lane
- fast travel
Work
- fast track
- fast-paced environment
- fast learner
Daily life
- fast food
- fast asleep
- fast talker
Sports
- fast runner
- fast pace
- fast break
会話のきっかけ
"What is the fastest thing you have ever seen?"
"Do you prefer a fast-paced life or a slow one?"
"Are you a fast learner?"
"Do you like fast food?"
"How fast can you run?"
日記のテーマ
Describe a time you had to move fast.
Why do people enjoy fast cars?
Is it better to be fast or accurate?
Write about a fast-paced day you had.
よくある質問
8 問自分をテスト
The car is very ___.
Fast is the correct adjective.
Which is correct?
Fast is an irregular adverb.
Is 'fastly' a correct English word?
Fastly is never used.
Word
意味
Match idioms to meanings.
City life is fast-paced.
スコア： /5
Summary
Fast is a simple, powerful word for speed that never needs an -ly ending!
- Fast means high speed.
- It is an adjective and adverb.
- Never add -ly.
- Commonly used in idioms.
Memory Palace
Native Speaker Habit
Cultural Context
Grammar Shortcut
関連コンテンツ
健康の関連語
一粒
A2One pill; a grain (for small, round objects like pills).
一片
A2One tablet; a slice (for flat objects like pills).
不正常
A2abnormal
以上
A2Above, over (a number)
酸痛
A2Sore; aching (especially muscles).
倒是
A2On the contrary; actually.
针灸
A2Acupuncture; traditional Chinese therapy.
扎针
A2to give an injection
急性
B1acute (illness)
急性病
B1Acute disease.
